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Physiologically-based pharmacokinetic model for evaluating gender-specific exposures of N-nitrosodimethylamine (NDMA)

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Abstract

N-nitrosodimethylamine (NDMA) is classified as a human carcinogen and could be produced by both natural and industrial processes. Although its toxicity and histopathology have been well-studied in animal species, there is insufficient data on the blood and tissue exposures that can be correlated with the toxicity of NDMA. The purpose of this study was to evaluate gender-specific pharmacokinetics/toxicokinetics (PKs/TKs), tissue distribution, and excretion after the oral administration of three different doses of NDMA in rats using a physiologically-based pharmacokinetic (PBPK) model. The major target tissues for developing the PBPK model and evaluating dose metrics of NDMA included blood, gastrointestinal (GI) tract, liver, kidney, lung, heart, and brain. The predictive performance of the model was validated using sensitivity analysis, (average) fold error, and visual inspection of observations versus predictions. Then, a Monte Carlo simulation was performed to describe the magnitudes of inter-individual variability and uncertainty of the single model predictions. The developed PBPK model was applied for the exposure simulation of daily oral NDMA to estimate blood concentration ranges affecting health effects following acute-duration (≤ 14 days), intermediate-duration (15–364 days), and chronic-duration (≥ 365 days) intakes. The results of the study could be used as a scientific basis for interpreting the correlation between in vivo exposures and toxicological effects of NDMA.

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All data generated or analysed during this study are included in this published article and its supplementary information files.

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Acknowledgements

This research was supported by Daewoong Pharmaceutical Co., Ltd (Yongin, Republic of Korea).

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Contributions

DWK: Writing—original draft, investigation, visualization. JHK: Writing—review and editing, data curation, formal analysis. GWC: Writing—review and editing. SC: validation. HYC: conceptualization, methodology, supervision.

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Correspondence to Hea-Young Cho.

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Kang, D.W., Kim, J.H., Choi, GW. et al. Physiologically-based pharmacokinetic model for evaluating gender-specific exposures of N-nitrosodimethylamine (NDMA). Arch Toxicol 98, 821–835 (2024). https://doi.org/10.1007/s00204-023-03652-8

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  • DOI: https://doi.org/10.1007/s00204-023-03652-8

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